Sublight speed Von Neuman probes (self replicating) are the kind of tech we are likely going to be able to produce ourselves sometime in the future.
Which is tech that would allow complete saturation/exploration of the entire galaxy on the order of millions of years. As essentially by the time one probe is able to reach one side of the galaxy from the host system the entire galaxy will have already been filled with probe copies.
It wouldn't be particularly difficult for a more advanced civ with potentially millions or billions of years evolutionary lead time on ourselves to have explored the galaxy and by extension have probes in our solar system.
These claims in the hearing are definitely extraordinary, but the tech required to "make it here" doesn't particularly need to be.
Which is tech that would allow complete saturation/exploration of the entire galaxy on the order of millions of years. As essentially by the time one probe is able to reach one side of the galaxy from the host system the entire galaxy will have already been filled with probe copies.
It wouldn't be particularly difficult for a more advanced civ with potentially millions or billions of years evolutionary lead time on ourselves to have explored the galaxy and by extension have probes in our solar system.
These claims in the hearing are definitely extraordinary, but the tech required to "make it here" doesn't particularly need to be.